new index	atom name	original index
1	C	5
2	C	6
3	C	7
4	C	3
5	C	2
6	N	4
7	O	1
8	H	11
9	H	12
10	H	13
11	H	15
12	H	14
13	H	16
14	H	17
15	H	18
16	H	19
17	H	9
18	H	10
19	H	8